Flow regulator



FIG. 1 is a top plan view of the flow regulator of our design;

FIG. 2 is a top isometric view thereof;

FIG. 3 is a front elevational view thereof, the rear, right and left sides being identical thereto; and,

FIG. 4 is a top isometric cross section view thereof.

The broken lines shown in the drawings form no part of the claimed design. 

CLAIM The ornamental design for a flow regulator, as shown and described. 